Q. What do the letters mean in the call numbers?

TCC uses the Library of Congress (LC) Classification System to shelve books by subject. The letters stand for the different subject areas. The Dewey Decimal system uses numbers instead. Most academic libraries use LC, however. Chances are, if you find one book in the area you're researching, other relevant books will be shelved beside it! Many of the TCC Library locations have blue posters hanging in the library which outline the information below as well.

See the list below how the books and videos are shelved:

A - General Works
B - Philosophy, Psychology, Religion
C - General History 
D - World History
     DA -DR Europe
     DS - Asia
     DT - Africa
     DU - Oceania
E - History/America
F - History of States
      F691-705 Oklahoma
G - Geography, Anthropology, & Recreation
H - Social Sciences
    HB & HC - Economics
    HD - Management, Employment
    HE - Transportation
    HF - Commerce
    HG - Finance
    HM - Sociology
    HN - Social History & Problems
    HQ - Family, Marriage, & Women
    HV2300-2700 - Deaf Culture
J - Political Science
K - Law
L - Education
M - Music
N - Fine Arts
P - Language and Literature
   PR - English literature
   PS - American Literature
Q - Science
    QA - Math
    QB - Astronomy
    QC - Physics
    QD - Chemistry
    QE - Geology
    QH - Biology
    QK - Botany
    QL- Zoology 
    QM - Human anatomy
    QP - Physiology
    QR - Microbiology
R - Medicine
RJ - Pediatrics
RT - Nursing
S - Agriculture
    SB - Horticulture
    SF - Animal Culture
T - Technology
   TA - TK - engineering
   TL - Cars, Aviation & Space
   TR - Photography
   TT - Handicrafts 
   TX - Cooking
U - Military Science
V - Naval Science
Z - Books, Writing, and Libraries